Whether it is due to chipped paint on 40-year-old windowsills or lead-glazed ceramic cookware, millions of children in the United States each year are at risk for lead exposure, usually in their own homes, according to the Centers for Disease Control and Prevention. Nearly 500,000 children ages 1-5 have blood-lead levels higher than 5 micrograms per deciliter, the level at which the CDC recommends public health actions be initiated. Previous studies suggest these levels can lead to behavior and learning problems, hyperactivity and anemia.